Make the phenotype flag live across system restarts in the test. am: 5120b5f637

Original change: https://googleplex-android-review.googlesource.com/c/platform/art/+/18344948

Change-Id: I6ac1c978cc7f6ade759fd12a334430a60894e24b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>